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How many bit strings of length five either start with two zeros or end with two zeros?

User Myon
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Strings of length five that starts with two zeroes = 1*1*2*2*2 = 8
Strings of length five that ends with two zeroes = 2*2*2*1*1= 8
Strings of length five that either starts with two zeroes or ends with two zeroes = 8+8 = 16
User Sam Grondahl
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